<SEC-DOCUMENT>0001104659-19-037508.txt : 20190625
<SEC-HEADER>0001104659-19-037508.hdr.sgml : 20190625
<ACCEPTANCE-DATETIME>20190625215251
ACCESSION NUMBER:		0001104659-19-037508
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190621
FILED AS OF DATE:		20190625
DATE AS OF CHANGE:		20190625

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Paterson Dan
		CENTRAL INDEX KEY:			0001563202

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35403
		FILM NUMBER:		19919855

	MAIL ADDRESS:	
		STREET 1:		215 FIRST STREET
		STREET 2:		SUITE 440
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142

	FORMER NAME:	
		FORMER CONFORMED NAME:	Paterson Daniel
		DATE OF NAME CHANGE:	20130314

	FORMER NAME:	
		FORMER CONFORMED NAME:	Paterson Dan
		DATE OF NAME CHANGE:	20121128

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Verastem, Inc.
		CENTRAL INDEX KEY:			0001526119
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				273269467
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		117 KENDRICK STREET
		STREET 2:		SUITE 500
		CITY:			NEEDHAM
		STATE:			MA
		ZIP:			02494
		BUSINESS PHONE:		(781) 292-4200

	MAIL ADDRESS:	
		STREET 1:		117 KENDRICK STREET
		STREET 2:		SUITE 500
		CITY:			NEEDHAM
		STATE:			MA
		ZIP:			02494
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>a4.xml
<DESCRIPTION>4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-06-21</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001526119</issuerCik>
        <issuerName>Verastem, Inc.</issuerName>
        <issuerTradingSymbol>VSTM</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001563202</rptOwnerCik>
            <rptOwnerName>Paterson Dan</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O VERASTEM, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>117 KENDRICK STREET, SUITE 500</rptOwnerStreet2>
            <rptOwnerCity>NEEDHAM</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02494</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and COO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>1.81</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2019-06-21</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>250000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2029-06-21</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>250000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>250000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The option vests as to 50% of the shares on the first anniversary of the date of grant and as to an additional 12.5% of the shares at the end of each successive three-month period following the first anniversary of the date of grant, provided that the Reporting Person continues to serve as an employee of or other service provider to the Issuer on each such vesting date.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Sean C. Flynn, attorney-in-fact</signatureName>
        <signatureDate>2019-06-25</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
